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DEBT - Obligations under Finance Leases (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Feb. 27, 2024 | Feb. 26, 2024 | Sep. 30, 2023
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Finance lease obligations | $ 262.0 |  |  | $ 193.0
Gross Amount | 24,581.0 |  |  | 19,563.0
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  | $ 910.0 | $ 810.0 |
Line of Credit Facility, Remaining Borrowing Capacity | $ 843.0 |  |  |
Interest rate |  | 2.25% | 2.50% |
Debt Instrument, Unused Portion, Fee, Percent | 0.50% |  |  |
Finance Lease Obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Finance lease obligations | $ 262.0 |  |  | 193.0
Term loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Gross Amount | 8,702.0 |  |  | $ 6,249.0
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 755.0 |  |  |

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